Trinity Sunday

The Feast that celebrates “the one and equal glory” of Father, Son, and Holy Spirit, “in Trinity of Persons and in Unity of Being” (BCP, p. 380). It is celebrated on the first Sunday after Pentecost. Trinity Sunday is one of the seven principal feasts of the church year (BCP, p. 15). The proper readings and collect for Trinity Sunday are used only on the feast, not on the weekdays following. The numbered proper which corresponds most closely to the date of Trinity Sunday is used (BCP, p. 228). The BCP also provides the proper “Of the Holy Trinity” for optional use at other times, subject to the rules of the calendar of the church year (see BCP, pp. 251, 927). The Hymnal 1982 presents ten hymns in a section on The Holy Trinity (Hymns 362-371), including “Holy, holy, holy! Lord God Almighty!” (Hymn 362), “Come, thou almighty King” (Hymn 365), and “Holy Father, great Creator” (Hymn 368).

Celebration of Trinity Sunday was approved for the western church by Pope John XXII in 1334. This feast is associated with Thomas Becket (c. 1118-1170), who was consecrated bishop on Trinity Sunday, 1162. His martyrdom may have influenced the popularity of the feast in England and the custom of naming the remaining Sundays of the church year “Sundays after Trinity.” The Sarum Missal and editions of the Prayer Book through the 1928 BCP named these Sundays the Sundays after Trinity. The 1979 BCP identifies this portion of the church year as the season after Pentecost, and names these Sundays the Sundays after Pentecost (see BCP, p. 32).

Ordinary Time

This term is used in the Roman Catholic Church to indicate the parts of the liturgical year that are not included in the major seasons of the church calendar. Ordinary time includes the Monday after the Feast of the Baptism of our Lord through the Tuesday before Ash Wednesday, and the Monday after Pentecost through the Saturday before the First Sunday of Advent. A vigil or other service anticipating the First Sunday of Advent on the Saturday before that Sunday would also be included in the season of Advent. Ordinary time can be understood in terms of the living out of Christian faith and the meaning of Christ’s resurrection in ordinary life. The term “ordinary time” is not used in the Prayer Book, but the season after Pentecost can be considered ordinary time. It may be referred to as the “green season,” because green is the usual liturgical color for this period of the church year. The BCP provides numbered propers with collects and lectionary readings for the Sundays of the Season after Pentecost. The Epiphany season includes the Epiphany, the First Sunday after the Epiphany: the Baptism of our Lord Jesus Christ, and the Second Sunday through the Last Sunday after the Epiphany (BCP, p. 31). In view of the Epiphany themes that are presented throughout the Epiphany season, it should not be considered ordinary time. However, many parishes use green as the liturgical color for the Second Sunday through the Sunday prior to the Last Sunday after the Epiphany, and sometimes the Last Sunday after the Epiphany. Epiphany season and the season after Pentecost vary in length depending on the date of Easter (see BCP, pp. 884-885).

(from the Episcopal Church websiter)